What is a sticky session?

Sticky session refers to the feature of many commercial load balancing solutions for web-farms to route the requests for a particular session to the same physical machine that serviced the first request for that session.

What is sticky session in Kubernetes?

Session affinity, sometimes referred to as sticky sessions, associates all requests coming from an end-user with a single pod. This means that all traffic from a client to a pod will be — to the greatest extent possible — directed to the same pod.

What is cookie based session persistence?

That technique is called cookie-based persistence. Rather than rely on the SSL/TLS session ID, the load balancer would insert a cookie to uniquely identify the session the first time a client accessed the site and then refer to that cookie in subsequent requests to persist the connection to the appropriate server.

What are sticky sessions in AWS?

Sticky sessions are a mechanism to route requests from the same client to the same target. Elastic Load Balancers support sticky sessions. Stickiness is defined at a target group level.

What is the use of sticky sessions?

Using sticky sessions can help improve user experience and optimize network resource usage. With sticky sessions, a load balancer assigns an identifying attribute to a user, typically by issuing a cookie or by tracking their IP details.

What is the difference between StatefulSet and Deployment?

A StatefulSet is another Kubernetes controller that manages pods just like Deployments. But it differs from a Deployment in that it is more suited for stateful apps. A stateful application requires pods with a unique identity (for example, hostname). One pod should be able to reach other pods with well-defined names.

What is meant by session affinity?

Session affinity is a feature available on load balancers that allows all subsequent traffic and requests from an initial client session to be passed to the same server in the pool. Session affinity is also referred to as session persistence, server affinity, server persistence, or server sticky.

What does session persistence mean?

Session stickiness, a.k.a., session persistence, is a process in which a load balancer creates an affinity between a client and a specific network server for the duration of a session, (i.e., the time a specific IP spends on a website).

What is sticky session in load balancer?

What is a sticky session. Session stickiness, a.k.a., session persistence, is a process in which a load balancer creates an affinity between a client and a specific network server for the duration of a session, (i.e., the time a specific IP spends on a website).

What is the difference between round robin and sticky sessions?

If sticky load balancers are used to load balance round robin style, a user’s first request is routed to a web server using the round robin algorithm. Subsequent requests are then forwarded to the same server until the sticky session expires, when the round robin algorithm is used again to set a new sticky session.

Do you need cookies for a sticky session?

To use sticky sessions, the client must support cookies. Application Load Balancers support both duration-based cookies and application-based cookies. The key to managing sticky sessions is determining how long your load balancer should consistently route the user’s request to the same target.

How is a sticky session assigned to a user?

With sticky sessions, a load balancer assigns an identifying attribute to a user, typically by issuing a cookie or by tracking their IP details. Then, according to the tracking ID, a load balancer can start routing all of the requests of this user to a specific server for the duration of the session.

What are the different types of sticky session persistence?

You will get to see the Imperva DDoS mitigation solution in action. There are two types of cookie-based session persistence: duration-based and application-controlled. Your load balancer issues a cookie that defines a specific timeframe for session stickiness.

How is sticky session used in load balancing?

Sticky Session is a method used with Load Balancing, to achieve server affinity. In other words, it assigns a particular client with a particular server instance behind Load Balancer, so that HTTP session doesn’t get lost across application instances.